Telautographic apparatus.



G. S. TIFFANY. TELAUTOGRf/PHIG APPARATUS. APyLIoATI'oN" FILED Amm. 1912` Patented Jan. 20, 1914.

2 SHEETS-SHEET 1.

G. SLTIFFANY. TELAUTOGRAPHIC APPARATUS.

APPLICATION FILED APR.5, 191.2

Patented Jau. 20, 1914.

2 SHEETS-SHEET 2.

, ing drawings, forming a part of the same.

suenen s. rirrnn'r, or sumar, NEW

TELnuroonarn. contratar, or Nnw stima.

Lfiw, Specification of JERSEY, nssrcnon, 'ro GRAY NATIONAL YORK, N. Y., A CORPORATION oF VIR- 'rnLaUaoGRaPHic APPARATUS.

Batters Patent-` Patltited dan. 20, 1914.

*application 'mea apra a, tina smal no. sessi?.

vThis invention relates to improvements in telautographic systems of the variable current-strength type. In these' systems as heretofore used, the pen-moving parts at the receiverhave included magnetic coils conv the tracer lines, these variations in current.

nected with the right and 'left tracer lines from 'the transmitter, and moving in a sui'tably excited magnetic field (provided by magnets of the salient pole type) to an ex' tent and in directions varying in accord ance with the variations in the strength of the currents from time to time traversing strength being controlled and effected by the transmitting tracer as it is moved laterall over its writ-ing platen.

I ave discovered that if magnets of the consequent pole type be substituted' for those "1 of the salient pole type just refer ed to, a great saving of power, and, therefpre, of current, maybe effected, and it is the object of the present invention to provide a telautographic system equipped with such consequent pole magnets. In the accompanying drawings Figure 1 is a diagrammatic view of a telautographic system embodying the present invention. Fig. 2 is a front elevation, partly in section, of the receiver pen-moving parts; and Fig. 3 is a side elevation of the same.

Referring to saiddrawings, A represents the transmitting instrument or transmitter, i

vand B the receiving instrument or receiver.

The former is provided with a current-sup-t plyingcircuit whose source of supply is ya current generator 1. this circuit being traced as follows: From the positive pole of genu erator 1, by wire 2 to a rheostat 3, and by wire 4 to a rheostat 5, and wire 6 from rheostat 3, and Wire 7 from rheostat 5, to the negative pole of generator 1, which is grounded by wire 8 at 9. Currents from this circuit are shunted from right and left rheostats 3, 5, into right and left tracer lines to the receiver, which are traced as follows: For the right line, a roller contact 10 enmovements of the pen mov-ing; A varying 1n extent and dlrection as the curlmsar gaging right rheostat 3, a lever 11, wire l2, movable coil V13 of right hand consequent pole 'magnet 14, and thence by wires 15, 1G, 1 7, to ground at 18; and for the left tracer l1nea roller contact 20, engaging left rheostat 5, a lever 21, wire 22, movable coil 23 of left consequent pole magnet 24, and thence by wires 47, 26, 16, 17, to ground at 18. Levers 11, 21, are pivotally mounted and have rigidly connected with them levers 30, 31, which are pivotally connected with pen arms 32, 33, inthe converging, pivotally connected ends of which is mounted the transmitting tracer 34 all in the usual, well-known manner. It will bc obvious that, as the transmitting tracer 34 is moved laterally or over its Writing surface Or platen, roller contacts 10,'20 will be moved along the rlieostats 3, 5, in directions and .to extents depending on the direction" and extent of such movementspft-he transwhch vary in strength in accordance with such movements of the tracer, will` be shunted into the ri ht and left tracer lines,

just described, leading from the transmitter to the receiver and ground. ffhbemcnrrents, as they vary 1n strength, in t Aeffect rent lncreases or decreasesinifltengtli. These coils in turn move the receiviig pen 35 laterally or over its writingp'latenjf inY unison with the movements of the transf.. mittin tracer over its writing platen,U throug connections which will presently ben mltting tracer, and, as a reailtl currents,"

described. Each of the coils 13, 23, includes a cylindrical shell 37 on which the coil is wound and which is slidably mounted on the core 38 of the magnet, and inside'the magnet shell 39.

The stationary windings 40, 41 at opposite ends of the magnet are excited from a local source of electric energy, namely, a generator 42, by a circuit consisting of wire 43 from the positive pole of said generator, wire 44 connecting windings 40, 41 of magnet 13, wire 45,4 wire 46 connecting windings 41, 40 of magnet 23, and wires 25, l26,

16 to the negative pole of ,generator 42.`

Each of the magnet shells 39 is provided with diametrically opposite longitudinal Openings 48, and journaled in a bracket 49 at the upper or Outer ends of these openings is a shaft 50. To this shaft are rigidly fixed a pair of segments 51, 52, which are connected by chains 53 with pins 54 fixed to shell 39 and projecting through the openings 48, so that as the coil 13 or 23 is drawn downwardly or inwardly along the magnet core, shaft 50 will be rocked in a clockwise direction. A spring secured at one end to a collar 56 fixed to shaft 50, and at the other end to a clip 57 fixed to a bolt 58, secured in bracket 49, opposes such movement of the shaft 50 and moves it in the opposite direction as the currents traversing the coil 13 or 23 decrease in strength. The two shafts 50 are provided with levers 60, 61, rigidly fixed to them, and pivotally connected with pen arms 62, 63, in the converging pivoted end of which the receiving pen 35 is mounted. It will be obvious that as the coils 13, 23 are moved different distances in their magnet fields, as the currents traversing the i right and left' tracer lines vary in strength, receiving pen 35 willbe moved across its writing platen 36 and reproduce the movements of the transmitting tracer.

The advantages of the consequent pole magnet system above described have been hereinbefore generally stated. In order that these advantages may be appreciated, I may add that with such magnets a' length of line or circuit may be operated which is between two and three times as long as 'the line or circuit which may be operated where salient pole magnets, with the same size co'il and the same size core are employed. This, with the resulting saving in power and current consumed, is due to the fact that the poles of the magnet are magnetized at both ends, the total {iuX in the air gap surrounding the magnet case and in which the coil moves is about doubled,.and the force eX- erted by the moving coil also about doubled, assuming thecurrent strength to be the same as in the case of the salient pole magnets.

No means are shown or described herein for effecting the movements of the receiving pen to and from its writing laten, nor for inking the receiving pen, or or shifting the paper at thc receiver. Any suitable means for these purposes may be adopted.

What I claim is :d

1. In a telautographic register, of the variable current-strength type, the combination with tracer lines connecting the transmitter and receiver, a source of electric energy therefor, a transmitting tracer and connections controlling the strength of the currents traversing the tracer lines as the transmitting tracer is moved over its writing surface, a receiving pen, and pen-moving parts therefor including consequent pole magnets provided with movable coils connected with the tracer lines and with the receiving pen.

2. In a telautographic system of the variable current-strength type, the combination with tracer lines connecting the transmitter and receiver, a current supplying circuit, a g

transmitting tracer and connections for shunting therefrom into the tracer linescurrents varying in strength as the transmitting tracer is moved over its writing surface, a receiving pen, and pen-moving parts therefor including consequent polemagnets provided with movable coils connected with the tracer lines and with the receiving pen.

3. In a telautographic register of thevariable 'current-strength type, the combination with tracer lines connecting the t ansmitter and receiver, a source of elect]l energy therefor, a transmitting tracer am connections controlling the strength of the currents traversing the tracer lines as the transmitting tracer is moved over its writing surface, a receiving pen, pen-moving parts therefor including consequent pole magnets provided with movable coils connected with the tracer lines and with the receiving pen, and a source of electric energy for stationary windings of said magnets.

4. `In a telautographic system of the variable current-strength type, the combination with tracer lines connecting the transmitter and receiver, a current supplying circuit, a transmitting tracer and connections for shunting therefrom into the tracer lines currents"varying in strength as the transmitting tracer is moved over its writing surface, a receiving pen, pen-moving parts l therefor including consequent pole magnets provided with movable coils connected with the tracer lines and with the receiving pen, and a source of electric energy for stationaryv windings of said magnets.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

GEORGE S. TIFFANY lVitnesses J. A. GRAVES,

E. VANDFRHOEF. 

